The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 1976
Filed:
Mar. 24, 1975
Jerry D Haney, Sunnyvale, CA (US);
Other;
Abstract
A method of and apparatus for determining when an unknown quantity is within a desired range of a reference quantity. The apparatus includes a dual slope integrator which integrates the reference quantity and the unknown quantity and discharges the resultant integrated levels. By integrating the reference quantity at least once and the unknown quantity at least twice for three different time periods which differ from one another by amounts which are proportional to the desired range, a comparison of the discharge times of the resultant integrated levels will provide an indication of whether the unknown quantity is within the desired range, when the desired range is a percentage of the value of the reference quantity. By integrating the reference quantity at least once and the unknown quantity at least twice for the same time period and then discharging each of the resultant integrated levels for three different time periods which differ from one another by amounts which are proportional to the desired range, a comparison of the times to further discharge to a preselected level will provide an indication of whether the unknown quantity is within the desired range, when the desired range is a percentage of full scale.